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authorMasahiro FUJIMOTO <mfujimot@gmail.com>2021-08-17 11:37:07 +0900
committerGitHub <noreply@github.com>2021-08-17 11:37:07 +0900
commit98a7793a51bdbdeefb172842e677dca22eb779e5 (patch)
treef07cde27678193afe366832bd58c958657fadc6c /files/pt-br/web/javascript/reference/global_objects
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Merge branch 'mdn:main' into 20210811-orphaned/Web/API/NavigatorLanguage
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</pre>
-<div class="note"><span style="color: rgba(0, 0, 0, 0.65098); font-style: italic; background-color: rgba(231, 228, 157, 0.247059);">Observação: O operarador de igualdade estrita (</span><code style="font-style: italic; color: rgba(0, 0, 0, 0.65098);">===</code><span style="color: rgba(0, 0, 0, 0.65098); font-style: italic; background-color: rgba(231, 228, 157, 0.247059);">) tem que ser utilizado aqui uma vez que </span><code style="font-style: italic; color: rgba(0, 0, 0, 0.65098);">x == undefined</code><span style="color: rgba(0, 0, 0, 0.65098); font-style: italic; background-color: rgba(231, 228, 157, 0.247059);"> também checa se </span><code style="font-style: italic; color: rgba(0, 0, 0, 0.65098);">x</code><span style="color: rgba(0, 0, 0, 0.65098); font-style: italic; background-color: rgba(231, 228, 157, 0.247059);"> é nulo, enquanto o operador não o faz. </span><code style="font-style: italic; color: rgba(0, 0, 0, 0.65098);">null</code><span style="color: rgba(0, 0, 0, 0.65098); font-style: italic; background-color: rgba(231, 228, 157, 0.247059);"> não é equivalente à </span><code style="font-style: italic; color: rgba(0, 0, 0, 0.65098);">undefined</code><span style="color: rgba(0, 0, 0, 0.65098); font-style: italic; background-color: rgba(231, 228, 157, 0.247059);">. Veja </span><span style="color: rgba(0, 0, 0, 0.65098); font-style: italic; background-color: rgba(231, 228, 157, 0.247059);">{{jsxref("Operators/Comparison_Operators", "operadores de comparação")}} (em inglês) para maiores detalhes.</span></div>
+<div class="note"><span style="color: rgba(0, 0, 0, 0.65098); font-style: italic; background-color: rgba(231, 228, 157, 0.247059);">Observação: O operador de igualdade estrita (</span><code style="font-style: italic; color: rgba(0, 0, 0, 0.65098);">===</code><span style="color: rgba(0, 0, 0, 0.65098); font-style: italic; background-color: rgba(231, 228, 157, 0.247059);">) tem que ser utilizado aqui uma vez que </span><code style="font-style: italic; color: rgba(0, 0, 0, 0.65098);">x == undefined</code><span style="color: rgba(0, 0, 0, 0.65098); font-style: italic; background-color: rgba(231, 228, 157, 0.247059);"> também checa se </span><code style="font-style: italic; color: rgba(0, 0, 0, 0.65098);">x</code><span style="color: rgba(0, 0, 0, 0.65098); font-style: italic; background-color: rgba(231, 228, 157, 0.247059);"> é nulo, enquanto o operador não o faz. </span><code style="font-style: italic; color: rgba(0, 0, 0, 0.65098);">null</code><span style="color: rgba(0, 0, 0, 0.65098); font-style: italic; background-color: rgba(231, 228, 157, 0.247059);"> não é equivalente à </span><code style="font-style: italic; color: rgba(0, 0, 0, 0.65098);">undefined</code><span style="color: rgba(0, 0, 0, 0.65098); font-style: italic; background-color: rgba(231, 228, 157, 0.247059);">. Veja </span><span style="color: rgba(0, 0, 0, 0.65098); font-style: italic; background-color: rgba(231, 228, 157, 0.247059);">{{jsxref("Operators/Comparison_Operators", "operadores de comparação")}} (em inglês) para maiores detalhes.</span></div>
<h3 id="Operador_Typeof_e_undefined"><code>Operador Typeof</code> e <code>undefined</code></h3>